<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        .left {
            /*float: left;*/
            width: 300px;
            height: 100px;
            background-color: red;
        }
        
        .right {
            float: right;

            width: 300px;
            height: 200px;
            background-color: blue;
        }
    </style>
</head>
<body>
    <div class="left">111</div>
    <div class="left">222</div>
    <div class="left">333</div>
    <div class="right">444</div>
</body>
</html>